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Why does energy gap decreases in each shell as it is further away from the nucleus? Shouldn't they all have the same electron repulsion?
An experiment shows that a 115mL gas sample has a mass of 0.170g at a pressure of 711mmHg and a temperature of 34C. What is the molar mass of the gas?
What is the magnitude of the apparent weight of a 70 astronaut 3600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
Calculate the frictional force on a 3000kg car rounding a 6m-radius curve at a speed of 35m/s
Given the data below, analyze the outcome of a polymerization in each solvent -- conclude by explaining which solvent you would choose and why.
The blocks stick together after the collision. Find the magnitude of the total initial momentum of the two-block system. Find, the magnitude of the final velocity of the two-block system. What is th
Calculate the amount of heat required to heat a 3.9kg gold bar from 30°C to 66°C. Specific heat capacity of gold is 0.128 J/g°
If the transmitted intensity varies by a factor of 4.50 during the rotation, what fraction of the intensity of the original beam is associated with the beam's polarized light?
A 4.00-kg model rocket is launched, expelling 49.0 g of burned fuel from its exhaust at a speed of 555 m/s. What is the velocity of the rocket after the fuel has burned?
A solution is prepared from 0.95g of Phosphoric acid and 1.15 g of perchloric acid in 150 ml of solution. How many milliliters of 0.425 M NaOH is required to neutralize 110 ml of this acidic soluti
A place kicker must kick a football from a pint 35m from the goal. as a result , the ball must clear the crossbar, which is 3.05m high. when kicked, the ball leaves the ground with a speed of 20 m/s
One spot on your plate traveled 4.3 cm when the solvent traveled 5.9 cm. What is the value of Rf for this spot?
What is the average current generated in the Cu(s)| Cu2+(aq)|| Fe3+(aq)| Fe(s) electrochemical cell if 50 g of Cu(s) are used up in a 24 hour period?
Three equal point charges, each with charge 1.10 , are placed at the vertices of an equilateral triangle whose sides are of length 0.200 . What is the electric potential energy of the system? (Take
What is the molar concentration of AgNO3 in a solution if titration of 25.00 ml of the solution with 0.300M NaCL requires 37.05ml of the NaCL solution to reach the end point?
The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction and, while both are passing overhead, an Earth observer measures the two sp
A car starts from rest on a curve with a radius of 190 m and accelerates at 0.400 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 m/s^
At 900 degree C, titanium tetrachloride vapour react with molten magnesium metal to form solid titanium metal and molten magnesium chloride. a). Write a balance equation for this reaction. b). what
A 4 kg object is attached to a spring with a spring constant of 10 N/m. The object is displaced 5 cm from the equilibrium position and let go. What is the frequency of the vibration?
A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle
What is the volume of propylene glycol, in gallons, needed to achieve the same antifreeze protection as 1.00 gallon of ethylene glycol.
If a pOH of 8.3 produces the best results for coagulation settling of a water, how much lime should be added to a water with an alkalinity of 255 mg/L as CaCO3 and pH of 7.5 that will be dosed with
An airplane is flying with a ground speed of 125 km/hr on a true course of 245 degrees. If the plane has an air speed of 145 km/hr and is on a heading of 20 degrees, what is the wind speed and direc
Calculate the molarity of the hydroxide ions in a solution that has been prepared by dissolving 70.3 g of barium hydroxide (Ba(OH)2) in water and diluting the solution to a final volume of 4.00 L.